var emptySeq = Observable.Empty();
var obs1 = Observable.EmptyThis example creates an empty sequence (obs1) and another sequence of integers (obs2) with the Range operator. The two sequences are then merged using the Merge operator, and the result is subscribed to with a Console.WriteLine call. Since obs1 is empty, only the values from obs2 will be emitted. In conclusion, Observable.Empty is a useful operator for creating a placeholder observable sequence or for combining with other sequences using operators like Merge. It is part of the System.Reactive.Linq package in C#.(); var obs2 = Observable.Range(1, 5); var mergedObs = obs1.Merge(obs2); mergedObs.Subscribe(Console.WriteLine);